@PostMapping("/test")
@Operation(summary = "[말즈] 관리자 메일 테스트", description = "관리자에게 메일 보내기 테스트")
@Deprecated
public ResponseEntity<ApiResponse<Boolean>> testMail() {
    log.info("controller 진입 성공");
    mailService.sendCustomMailToAdmin("제목", "내용");
    return ResponseEntity.ok(ApiResponse.onSuccess(true));
}

@Value("${spring.mail.username}")
private static final String ADMIN_MAIL_USERNAME = "cozymate0";

private static final String ADMIN_MAIL_DOMAIN = "@gmail.com"; // 관리자 이메일 주소

public void sendCustomMailToAdmin(String subject, String content) {
    try {
        MimeMessage message = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message, true, "UTF-8");

        helper.setTo(ADMIN_MAIL_USERNAME + ADMIN_MAIL_DOMAIN);
        helper.setSubject(subject);
        helper.setText(content, true); // 전달받은 content를 그대로 전송
        mailSender.send(message);

    } catch (MessagingException e) {
        throw new GeneralException(ErrorStatus._MAIL_SEND_FAIL);
    }
}

@DeleteMapping("/withdraw")
public ResponseEntity<ApiResponse<String>> withdraw(
    @AuthenticationPrincipal MemberDetails memberDetails,
    @Valid WithdrawRequestDTO withdrawRequestDTO) {
    memberCommandService.withdraw(withdrawRequestDTO, memberDetails);

    return ResponseEntity.ok(ApiResponse.onSuccess("회원 탈퇴가 완료되었습니다."));
}

public record WithdrawRequestDTO(
    @Length(max = 100, message = "탈퇴 사유는 최대 100자")
    String withdrawReason
) {
}

private final MailService mailService;

public void withdraw(WithdrawRequestDTO withdrawRequestDTO, MemberDetails memberDetails) {
    String withdrawReason = withdrawRequestDTO.withdrawReason();
    String mailSubject = memberDetails.member().getNickname() + "탈퇴 사유";

    mailService.sendCustomMailToAdmin(mailSubject, withdrawReason);
    memberWithdrawService.withdraw(memberDetails.member());
}

cookie.setSecure(true);